42001770 has 32 divisors (see below), whose sum is σ = 101943360. Its totient is φ = 11073920.

The previous prime is 42001763. The next prime is 42001777. The reversal of 42001770 is 7710024.

It is an interprime number because it is at equal distance from previous prime (42001763) and next prime (42001777).

It is not an unprimeable number, because it can be changed into a prime (42001777) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5196 + ... + 10535.

It is an arithmetic number, because the mean of its divisors is an integer number (3185730).

Almost surely, 2^42001770 is an apocalyptic number.

42001770 is an abundant number, since it is smaller than the sum of its proper divisors (59941590).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42001770 is a wasteful number, since it uses less digits than its factorization.

42001770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15830.

The product of its (nonzero) digits is 392, while the sum is 21.

The square root of 42001770 is about 6480.8772554339. The cubic root of 42001770 is about 347.6075474099.

Adding to 42001770 its reverse (7710024), we get a palindrome (49711794).

The spelling of 42001770 in words is "forty-two million, one thousand, seven hundred seventy".